[(2R,3R,4R,5R)-2-(2,4-dioxopyrimidin-1-yl)-4-hydroxy-5-(hydroxymethyl)oxolan-3-yl] phosphate
[(2R,3R,4R,5R)-2-(2,4-dioxopyrimidin-1-yl)-4-hydroxy-5-(hydroxymethyl)tetrahydrofuran-3-yl] phosphate
[(2R,3R,4R,5R)-2-(2,4-dioxo-1-pyrimidinyl)-4-hydroxy-5-(hydroxymethyl)-3-tetrahydrofuranyl] phosphate
[(2R,3R,4R,5R)-2-(2,4-diketopyrimidin-1-yl)-4-hydroxy-5-methylol-tetrahydrofuran-3-yl] phosphate